Thread-tensioning device for embroidery-machines.



A. KELLER. THREAD TENSIONING DEVICE FOR EMBROIDERY MACHINES. APPLICATION FILED JUNE 26,1912 l 5ffl559 Patented Apr.1, 1913.

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WITNESSES INVENTOR g f1 Anwn Zier g I, I .A (7% W I V (IRA/W A. KELLER. READ TENSIONING DEVICE FOR EMBROIDERY MACHINES.

APPLICATION FILED JUNE 26, 1912.

Patented Apr. 1, 1913.

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mum/r03 ATTORNEY Hun. ilulli Ania??? ffeZ 2w W/T/VESSES A. KELLER. THREAD TBNSIONING DEVICE FOR EMBROIDERY MACHINES. APPLICATION FILED JUHBZB, 1912. w LE5 1,5590 Patented Apr.1,1913.

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A A TTQR/UE V tlNlTE PATENT ANTON KELLER, OF NEW YORK, N. Y., ASSIGNOR 'IO IMPROVED SGHIFFLI MACHINE COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEV] YORK.

THREAD-TENSIONING DEVICE FOR EMBROIDERY-MACHINES.

Original application filed February 16, 1912, Serial No. 677,895.

Serial No, 705,913.

To all ici'w'm '1'! may concern:

do it known that Ldwrou Knnnnn, a subject of the l hnperor o't Austria-Hungary, residing; at New York, lmrough of the Bronx, in the county of New York and State of New York, have invented certain new and useful Improvements in Thread-Tensioning Devices for E1nln-oidery-l lachines, of which the following is a specification.

This invention relates to improvements in shuttle embroidery machines, and has for its object the provision of. improved mechanism for facilitating the embroidering of the work in an effective and comparatively simple manner, it. more particularly relating to the means for su jiplying the thread to the needles, whereby the tension on the several threads may be sinmltaneously increased or decreased as occasion may require, the present. application being a division of my convteniporaneously pending application, Serial No. (377,895, filed February 16, 1912.

Shuttle embroidery machines are frequently about ten yards long and have a series of reciprocating borers equally spaced apart throughout the entire length of the machine and a series of reciprocating needles also equally spaced apart througlr out the entire length of the machine, and the borers are located in sections carried by bars.

l n en'ihroidery machines frequently marketed the thread tension consists of a roller around which the thread is wound, which roller is located intermediate the spools and the needles, but in this construction of machine it is not. possible to increase or decrease the tension on all of the threads simultaneously.

In the drawings accompanying and forming part of this specification, Figure 1 is a cross-sectional view taken in line l1 of Fig. 2, looking toward the left; Fig. 2 is a top plan view of a portion of the machine illustrating this improved tension mechanism; and Fig. 3 is what may be considered a front View of the embroidery mechanism lookin toward the right hand in Fig. 2 and illustrating this improved. tension mecha' nism.

Similar characters of reference indicate corresponding parts throughout the drawi1 gs.

In the present embodiment the frame- Specifieation of Letters Patent.

Paton ted Apr. t, it tit 3.

Divided and this application filed June work 2 of the machine may be of any suit able construction usual to machines of this class, as may also he the n'ieans 1-) for supporting the work to be emln-oidercd. This frame-work supports a. needle-earrying bar 4 and a borer-carrying bar 5, see Fig. 23, the latter shown located below the nctullcwarrying bar and both of which are shiftable by .the usual means 'n'ovidcd for this purpose. Each of the needles 6 is secured in a suitable carrier 8, which carriers are substantially similar to each other.

The tensioning means in the present. instance comprises a series of tensioning devices Fl), one for each needle, carried by a suitable support 33 on the frameavork of the machine. Each of these tensioning devices comprises a rigid upstanding member Stand a pivotally supported member 35 pivotally supported intermediate its ends on a pair of laterally extending cars 36 of the rigid mem her. The rigid upstanding member is provided with a laterally extending pin 37 pro jecting into an opening 38 of the swinging member, and on this pin is located. a pair of thread-engaging disks 3%) between which the thread passes. On this pin and between those disks and the uppenend of the swinging member isglspring -10. Located in the flz'llllO-VVOIk of the machine and extending throughout the entire length thereof is a shift-able rod or bar 41 carrying at intervals along the same a series of projecting pins t2, one for each tension device, and it pro jects between the swinging and the rigid members of the tension device, whereby on the shifting of this bar the pins will engage the lower end of each swinging member, which is preferably bent toward the rigid member for this purp0se,and so shift the upper end of the swinging member toward or from the thread-engaging disks and thus increase or decrease the tension on the thread in a manner which will be readily understood, If the tension is too tight the rod will be shifted in one direction and so release the tension a predetermined amount.

if it is too loose, by shifting the rod in they opposite direction the lower end of each swinging member will be moved away from its rigid member, while its upper end will compress its spring and so increase the tension upon the disks and therefore upon the cluding a fixed member and a movable memher, and a lengthwise shiftable rod having pins projecting therefrom and correspondmg in number with the number of tensioning devices and one engaging the movable member of each tensioning device whereby on the shifting of said rod the tension of all of the tensioning devices may be simultaneously increased or decreased.

In a shuttle embroidery machine, the combination of a reciprocatory needle bar carrying a series of needles, independent tensioning devices one for each of the needle threads, each of said tensioning devices including a fixed upstanding member and a spring-pressed pivotally supported member, and a shiftable rod having pins corresponding in number with the number of tensioning devices and one engaging the pivotally supported member of each tensioning device whereby on the shifting of said red the tension of all of the tensioning devices may be simultaneously increased or decreased.

3. In a shuttle embroidery machine, the combination of a series of needles, independent tensioning devices one for each of the needle threads and each including a swinging member, and lengthwise shiftable means simultaneously coiiperating with each of the tensioning devices thereby. to change the tension on the threads.

4. in a shuttle embroidery machine, the combination of a series of needles, independent tensioning devices one for each of the needle threads, each of said tensioning devices including a fixed member and a pivotally supported member, and lengthwise shiftable means for engaging the pivot-ally supported member of each of said tensioning devices thereby to change the tension on all of the tensioning devices simultaneously.

5. In a shuttle embroidery machine the combination of a series of needles, independent tensioning devices one for. each of the needle threads, each of said devices including a fixed member and a spring pressed pivotally supported member, and a shiftable member having means corresponding in number with the number of tensioning devices and one engaging the pivotally supported member of each of said tensioning now/see devices below the pivot thereof whereb on the shifting thereof the tension on each of said tensioning devices will be simultaneously changed.

6. In a shuttle embroidery machine, the combination of a series of needles, independent tensioning devices one for each of the needle threads and each including a swinging member, and a lengthwise shiftable rod having a series of members cooperating one with each of said tension devices whereby on' the shifting of said rod the tension on all of said tensioning devices will be simultaneously changed and all of them maintained under a permanent constant tension.

7. In a shuttle embroidery machine the combination of a series of needles, independent tensioning devices, one for each of the needle threads, each of said devices comprising a fixed upstanding member having a laterally projecting pin, a pair of thread engaging disks mounted on said pin, a member pivotally supported on, said upstanding member :md having a part receiving said pin and a part projecting below its pivotal support, a spring mounted on said pin between said disks and the pivoted member, a shift-able rod, and means carried thereby for engagingthat part of the pivoted member extending below its pivotal support whereby all of said pivoted members may be shifted simultaneously to increase or ecrease the tension'on the threads.

8. In a shuttle embroidery machine, the combination'of a series of needles, independent tensioning devices, one for each of the needle threads, each of said tensioning de vices comprising a fixed upstanding member, spring pressed thread engaging devices carried thereby, a pivotally supported member cooperating with said spring to press or release the same, and means for simultaneously shifting all of said pivotally supported members whereby the tension on the threads may be simultaneously increased or decreased.

9. In a shuttle embroidery machine, the

combination of'a series of needles, a series of tensioning devices, one for each needle;

bcr, spring controlled thread engagmgthread, each comprising a supporting memmeans carried thereby, a pivotally supporte member effective to press or release the spring, and lengthwise shiftable meanscooperating with all of said pivotally \supported members for swinging the same thereby 'to simultaneously increase or de-. crease the tension on all of the threads.

10. In a shuttle embroidery machine, the combination of a series of needles, a series of tensioning devices, one for each needle thread, each comprisin a supporting member, spring controlle means carried thereby, a pivotally supported member effective to press or release the thread engaging spring and having a bent lower end, a Signad at 1821 Park Row Building, New lengthwlse shl'ftable rod and plus earned York, N Y., tlus 21st day of June, 1.912. thereby each pro echng mto pusltlon to en T T the bent luv-fer and of a pivoted member 1 Ah FOB KELLER whereby on shifting the red the tension on Wiinassw: thethrezlds will be simultaneo'usly increased F. E. BOYCE, or decreased, B. MCGUIRE. 

